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Homephp教程php手册php fopen从100万条记录的文本文件取出重复数最多的前10条

fopen函数对于文件的读定操作是专业的并且速度是非常的快了,有时我们没用用到数据库只用到了txt文件了,下面我们来看看fopen从100万条记录的文本文件取出重复数最多的前10条的例子。

100万条记录的文本文件,取出重复数最多的前10条。

示例文本:

098
123
234
789
……
234
678
654
123

$fp = fopen('文件', 'r');
    while($buf = fgets($fp)) {   $res[$buf]++;
}
fclose($fp);
arsort($res);
$res = array_keys(array_slice($res, 0, 10));
print_r($res);
$a = file('文件');
$res = array_count_values($a);
arsort($res);
$res = array_keys(array_slice($res, 0, 10));
print_r($res);


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